I would say it depends on the context, because usually when you point out something is man-made, you're implying it somehow isn't the same as the "natural" thing, that it has some noticeably artificial quality that distinguishes it from the "natural" thing. So, you might refer to photons from a lamp as "man-made" if it's your intention to underscore the different frequency ranges you get in light from artificial sources as opposed to natural ones, but otherwise, there's no point in mentioning it. Photons are photons whether they come from a laser or the sun.